Sectional boiler



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Patented June 10, 1919.

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WILLIAM M. MACKAY, or EAs'r ORANGE, NEW JERSEY.

sEo'rIoNAL EOILEE.

Specification of Letters Patent. Patnted unie 10, 1919,

Application filed August 3, 1917 d Serial No.1184,223. l

To all whom t may concern Beit known that I, WILLIAM M. MAGKAY, acitizen of the United States, residing at 73 Warrington Place, EastOrange, county of Essex, and State of New Jersey, have invented certainnew and Iuseful Improvements in Sectional Boilers, fully described andrepresented in the following specification and the accompanyingdrawings, forming a part of the same.

This invention relates to a boiler having a base containing an ash-pitsection and provided with a grate upon the top, the boiler being formedof sections which form a central magazine with water-space surroundingthe sides and top of the same, with a water-leg surrounding the firebox,anda shoulder extended from the bottom of the magazine to the water-legparallel with the grate, a combustion-chamber above the magazine,fire-tubes extended through the waterspace around the magazine from theshoulder to the combustion-chamber, a smokeehamber adjacent to suchcombustion-chamber, and a deflector between the two cham:

bers with an opening for the indirect movement of the gases from thelire-tubes' through the combustion-chamber to the smoke-chamber.

These features are obtained by making the firebox section to extendabove the top of the magazine and recessed in said top to form the lowerpart of the oombustionchamber; by making the deflector-sectionwith'reeess upon its under side forming the upper part of thecombustion-chamber and a recess upon its upper side forming the lowerpart of the smoke-chamber, and a dome-section with recess Yupon itslower side to form the upper part of the smoke-chamber. Thedeflector-section is .formed with a water-plate with notch inV one edgethrough which the smoke passes from the combustion-chamber to thesmoke-chamber, and an opening is extended to the outside of the boilerfrom the combustion-chamber and from the smoke-chamber below and aboveAthis notch so that a door applied to the said opening overlaps thesections above and below theopening, and gives full aecesslto both thesechambers for cleaning out the same.

The shallowness of the recessesV facilitates the casting of thesections.

fire-tubes,

The fuel may be burned with either an upward or downward draft, aslthe'upwar'd draft 1s produced by closing the bevel-flap on the door ofthe magazine and opening `the bevel-Hap on the door in the ash-pit, sothat air passes upward through thel grate and the products of combustionmove wholly -upward through the fire-tubes.

Upon the contrary, the closing of the ash-- pit bevel-door and theopening of the magazineV bevel-door -causesthe draft Vto move downwardlythrough the fuel in the magazine and thenV upward through the fire-tubeswithout passing through the grate.

The invention will bev understoodbyV reference to the annexed drawing,in which Figure 1 is a vertical section taken at the center line of Fig.2; Fig. 2 is a vertical section taken at the center line of Fig. l

with the top section formed as :a steamdome; Fig. 3 is aplan of theflrebox section of Fig. l; Fig. 4L is a plan of the middle or deflectorsection, of Fig. l;v and Fig. 5 is a plan of a firebox of alternativeshape.

The boiler is shown formed with' an ashpit section, a fire-box sectionA, a defiector section B Vand a dome section C.

The fire-box section is set-upon a base D having a grate E and anash-door E', and this section, as shown'in Fig. 3, has a circularmagazine G from which a doorway E2 extends to the outer side of thesection.

A horizontal shoulder j is shown extended from the bottom of themagazine to an antween the wall of the magazine andthe outer shell ofthe section, as shown in Fig. 3. A combustion-chamber f is formed in thetop of thesection A', as shown in Fig. 3, over themagazine and over thetops of the with which it has open connection. 1 Y

The deliector section B vis formed, as shown in Figs. 2 andgl, of awater-plate or disk having a Vsmoke-chamber h2 in the top, and a notchB2 eut out of one edge, as

shown in Fig. 2, to permit the passage of the gases from thecombustion-chamber. f to the smoke-chamber it?. v

The notchis so arranged as to drive the gases from 'the rear to thefront portion of the defle'ctor section, thus retaining them longer inthe combustion-chamber to fully complete their combustion.

A damper-box r is attached to the `outlet m of the smoke-chamber, and isprovided'on the top of a collar for the smoke-pipe s2 and aft the outerend with a hinged checkdamper t.

An auxiliary or throttling damper a is hinged with-in the boX 4adjacentto the outlet fm .and proportioned to close about threequarters orf fthepassage in the Idamper-box when this ydamper is drawn across saidpassage.

The two damgpe'rs :are lconnected by va link o which hol-ds the`dar-nper u 'entirely open when the damper t is closed, and when thecheek-damper Yis open, Ethe Vlink 'draws the damper u across 4thepassage, and thus Vgreatly checks the escape oi` gases, while it.permits la sullici'ent'escape to prevent back- Vdraft :oit suclrgasesfrom the furnace.

The doors E :and E2 have hinged flaps (Z4 faynd d5 -to admit air whendesired; and 'when 'the air 1is admitted ca-t the ash-door and the4fuel-doorM is closed, the draft is upward vthrough the 'grate-g butwhen vthe umagazine is nearly 'filledfwith uel :and the ash-door whollyclosed, theflap on the -door E2 may be Iopened more or less, and thedrafft passed 4downward `through coal in the magazine 'to the'tire-tubes.

1n Figs. l and '2, a drop-llange s is shown vlenteiided 'down-ward-i-rom the inner corner' of the shoulder j, to Aguard the bottoms Volithe fire-tubes v'from any crowding kof coal into'the tubes.

With this 'iconstructiom the coal 4flowing down from the magazineslaiits laterally downward from the flange, and forms an annularcombu'stionlspace lat the bottoms of lthe fire-tubes, which lgreatlypromotes the vcombustion of the fuel, while it wholly ,prevents anyobstruction lof the tire-tubes by the coal.

rPhe construction furnishes a x very free land iunobstructed V.passagefor the water,

Afrom the 4inlet -at the lwater-leg around the tire-.space tothe outletat the top, and thus 'secures the free circlulation 'that is desired insuch sa boiler.

ln practice, itheoutsides of all the 'sections farecoated .or clothed4with .asbestos for other non-heat 4conducting jacket, but this is Vnotshown inthe drawing, as it would obscure theactual construction, andforms no part ofgthe ,present invention. 4

'lhefireboir section shownin Fig. is of rectangular orm Aand exactly ofthe same vdiameter as that shown in Fig. 3, but has a greater peripheryand .a Irgreater area, while it occupies in practice no more roomor-ioorspace than the circular lireboX. It thus affords room for moretire-tubes, and permits the spacing of such tubes farther apart tosecure a freer circulation of water. I have therefore claimed theYrectangular form on account of its advantages.

l claiml. A steam or hot-water boiler formed of four sections withhorizontal oints, comprisprising a base with grate thereon, a hreboxsection having a central magazine with water-space surrounding the sidesand top of the saine 'and having the lower part of thecombustion-chamber recessed in the top of the section, awater-leg'extended downward below the bottom of the magazine,fire-tarbes extended through the water-space' from the said hre-boxupwardly into the vcombustionchamber, a dellector-section formed of akwater-.plate recessed upon the under side to form the upper part of thecombustionvchamber and having a notch in one edge for fthe upwardpassage ,of the gases, :the periphery of the notch being entirelysurrounded by space iilled with water to absorb heat from the gasespassing throudh such notch, and a. dome-section tted to t e top of thedel'ector-section with their ad- .jacent surfaces recessed Vto form asmokechamber, and .a smoke-outlet extending from .such chamber throughthe wall oi the section. l 2. A :steam or hot-water boiler formed offour sections with horizontal joints, comprising .a ybase with gratethereon, a VirehoX section having a central 'inagazine with water-spacesurrounding the sides yand top of the same and having acombustion-chamber-recessed in the top of the section, watertubesextending through vthe water-space around the magazine from thefireboxv'into the combustion-chamber, a .deflector-.section -forined ofa water-plate having a .recess in its under side forming the 1top of theycombustion-chamber and a recess in its uppers-ide forini-n-g Vthebottom of the .snioke-chamber,

yand having la .notch in onev edge for the .upward passage of lthegases, and a dome-section fitted `to fthe-top .of thecleliector-section'and having ya recess y upon its under side forming the top of thesmoke-chamber, a

cleaning opening yextended laterally from' ythe combustion-chamber andsmoke-.chaint:ber rto the full depth of 4the saine, yand a fuel-spaceextended upwardly therefrom, a tion having a doorway and door connectedshoulder extended horizontally around the with the fuel-space in thebottom of the sec- 10 bottom of the magazine to the water-leg, a tion,and a doorway and door connected with combustion-chamber above the topof such the magazine near the top of the section. magazine and aStraight row of tubes upon In testimony whereof I have hereunto set eachof three sides of the Section extended my hand.

upwardly from the shoulder to the said combustion-chamber, the fourthSide of the sec- WILLIAM M. MACKAY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. c.

